My games start lagging after 15-20 mins . i have nvidia GT520 card , video memory is 2GB
More abouttemp high
you shouldnt have bought the 520. it is actually weaker than the gt220 that was a couple of generations ago.
80c is pretty hot. might want to direct some more fans on it
I would say so for a passively cooled card, they are going to get hot under load and this is pretty bad for any graphics card. Make sure you case has adaquate cooling and try cleaning you computer of dust.